IMPROVEMENT OF TRANSIENT STABILITY OF POWER SYSTEM BY IPFC, SSSC AND STATCOM

Abstract

Power engineers are currently facing challenges to increase the power transfer capabilities of existing transmission system. Flexible AC Transmission system (FACTS) controllers can balance the power flow and thereby use the existing power system network most efficiently. Because of their fast response, FACTS controllers can also improve the stability of an electrical power system by helping critically disturbed generators to give away the excess energy gained through the acceleration during fault.
This paper examines the influence of three FACTS controllers such as Interline Power Flow Controller (IPFC), Static Synchronous Series Compensator (SSSC) and STATic synchronous COMpensator (STATCOM) on the synchronizing power and damping power of a single-machine infinite bus system. The main function of series-FACTS (IPFC and SSSC) is to compensate for the voltage drop across the impedance transmission line while the shunt-FACTS (STATCOM) provide voltage support at the point of connection at the transmission line.
The efficiency of the proposed control laws are tested and analysed through computer simulation.